3⼀7-1⼀8×3⼀7脱式计算用简便方法?

2025-04-05 15:47:17
推荐回答(1个)
回答1:

方法一:
3/7-1/8*3/7
=3/7*(1-1/8)
=3/7*7/8
=3/8
方法二:
3/7-1/8*3/7
=(56*3/7-56*1/8*3/7)/56
=(24-3)/56
=21/56
=3/8